What is the difference between vitamin D2 and vitamin D3?
The primary difference between vitamin D2 and vitamin D3 is that vitamin D2 is not naturally produced by humans. It is produced by invertebrate animals, plants and several fungi. Only vitamin D3 is naturally produced in vertebrates, such as humans through the sun exposition. It also occurs naturally in several plants.
In fact, there are five different forms of vitamin D based on their chemical structure. The two most common forms are D2, called ergocalciferol and D3, called cholecalciferol. Vitamin D2 is not naturally produced by humans, but is used in some supplements over the counter. Both vitamin D2 and vitamin D3 are available in the form of tablets in most pharmacies, although D3 is more common.
Scientists discuss the efficacy of vitamin D2 absorption in humans. Some feel that both vitamin D2 and vitamin D3 are equally effective in raising vitamin D levels in people's blood. Others suggest that the absorption of vitamin D2 can be only 40% vitamin D3.
Because vitamin D3 rarely occurs in food, it must either absorb it through direct sunlight or from a solar bed, or take it in the form of a pill. Vitamin D deficiency can lead to diseases of changing bones such as intersections or osteomalacia, or this could prevent proper hair growth. The recommended dosage of vitamin D by the US Medical Institute of National Academy is 200 international units daily (IUS) up to 50 years and higher doses with increased age. This does not reach most modern sciences that indicates a favorable level of vitamin D at 1-5 000 IU per day.
in both forms are vitamin D2 and vitamin D3 for the body useful in a number of different ways. They facilitate calcium production, which is very important in the building and strengthening of bones. In some observational studies VitamV D, it is associated with a reduction in some cancers, although it remains unproven. In addition, some scientists now promote the benefits of vitamin D VThe fight against depression and develops a connection between low levels of vitamin D and seasonal affective disorder.
Vitamin D2 and Vitamin D3 can be toxic if they are used to too high doses. Side effects include hypercalcaemia, nausea, vomiting and finally kidney failure. Pregnant women should be careful because too much vitamin D can lead to mental retardation and fetal deformities.